Grooving-machine.



.l. M. MADIGAN & D. C. SMITH.

GROOVING MACHINE.

APPLICATION FILED APR. 26. 1915.

Patented May16, 1916.

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THE COLUMBIA PLANDGRAFH'CO., WASHINGTON, D. c.

J. M. MADIGAN & D. C. SMITH.

GROOVING MACHINE.

APPLICATION FILED APR.26, 1915.

- Patented May16,1916.

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THE COLUMBIA PLANOGRAPH v60-, wA$HlNGTON ,,n.- C.

JOHN M. MADIGAN AND DANJIELVC. SMITH, or LAWRENCE, MASSACHUSETTS.

GROOVING-MACI-IINE.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed April 26, 1915. Serial No. 24,104. I

To all whom it may] 007mm Be it known that we, JOHN M. MADIGAN and DANIEL O. SMITH, citizens of'the United States of America, and residents of Lawrence, in the county ofEsseX and State of Massachusetts, have invented certain new' and useful Improvements in Grooving-Machines, of which the following is a speclfica tion.

This invention relates to machines for forming in the flat face of a heel part or toe part of a last a transverse slot or groove the ends of which are well within the sldes of the last, and has for its object the production of a machine of this class which will be simple to operate, durable, and effective in its operation.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents an elevation, partly in section, of a machine embodying the principles of the present 1nvention. Fig. 2 represents an end elevationv of the same. Fig. 3 represents a plan of a portion of the work support, and Fig. 4 represents a perspective of a last showing the operating tool in position to cut the transverse slot. I

In the drawings, 10 is a frame having formed thereon two alined bearings 11 and 12 and a forwardly extending plate 13 perpendicularto the-axes of said bearings 11 and 12. Mounted in the bearings 11 and 12 is a revoluble shaft 14 having secured thereto the driving pulley 15 intermediate the bearings 11 and 12. One end of the revoluble shaft 14 is provided with an annular groove in which is positioned a collar 15 having trunnions 16 extending into slots 17 in the forked end of a lever 18 pivoted at 19 to the frame 10. This lever may be moved about its pivot in any well known manner to reciprocate the shaft 14 endwise, the hub of the pulley 15 coming into contact with the adjacent face of the bearings 11 and 12 limiting the reciprocatory movement of theshaft 14 in either direction. The opposite end of the shaft 14 is provided with a chuck 20 in which is mounted a drill 21. The vertical plate 13 is provided with a perforation 22 therethrough through which the chuck 20 and the drill 21 is adapted to 0f the fore pass during r A guideway 23 is formed in the rear face' of the vertical pla'te 13 and in this guideway is mounted a slide 24. Plates 25 secured to the vertical plate 13 prevent the displacement ofthe slide 24. The slide 24-is provided with a rearwardly extending flatsided flange 27, at the upper end of which are positioned curved ribs 28 on either side thereof. The flange 27 and the ribs 28 form a work support, the flange 27 being adapted to enter the slot 29 in the fore-part 30 of a last, while the curved ribs 28 enter the semicylindrical groove 31 in the face 32 of said fore-part, the shoulder 33 at the upper end of the semi-cylindrical groove 31 resting upon the'upper face of the ribs 28. At either end of the plate 13 is secured a bracket 34 having adjustably mounted therein the limiting stops 35 to limit the reciprocatory movement of the slide 24 in either direction. When the fore part 30 of a last is placed upon the work support 27 and 28 with the flange 27 in the slot 29 and the shoulder 32 resting on the-upper face of the ribs 28, the operator can easily retain the face 32 against the face 36 of the slide 24 and move the slide intermittingly in either direction against the stop members 35. The drill 21 will be rotated during this operation by means of the pulley 15 and the operator by suitable treadle mechanism will be forcing the drill in the direction of the arrow as on Fig. 1 of the drawings.

The continuous rotation of the drill 21 with the gradual movement of the revoluble shaft 14 in the direction of the arrow at and the repeated reciprocations of the slide 24 with its work thereon will cause the transverse groove 37 to be formed in the face 33 part of the last. The length of the groove 37 may be varied by adjusting the members 35.. This makes a very simple device for grooving the face 32 of the fore part 30 of a last where it is desired that the ends of the groove be kept within the side faces of the last.

It is believed that the operation and many advantages of this device will be fully understood from the foregoing description.

Having thus described our invention, we claim 3 1. In a machine of the class described, the combination of a revoluble drill; means for rated member surrounding said drill and adapted to be reciprocated perpendicularly to the axis thereofgand a Work support on the face of said reciprocating member perw pendicular to the direction of movement thereof and consisting of an outwardly elitending flat-sided flange adapted to enter a slot in the Work, said fiangehaving semicylindrical ribs at the upper end thereof.

2. In a machine of the class described, the combination of a revoluble drill; means for reciprocating said drill endwise; a member adapted to be reciprocated perpendicularly to the axis of said drill and providedwith Copies oftliis patent may be obtained for five cents ea'ii, by addressing the an elong ated slot tli'rongh which said drill is adapted to be projected; a semi-cylindrical lng p rojecting froIn the front face of said reciprdcating ineriib'e r above the center ofsaid slot; and a flat-sided rib interposed between said lug and slot and projecting forwardly beyond said lug. A

Signed by us at 4: Post Oifice Sop, Boston,

' llth day of April, 1915.

Mass, this JOHN-.M. MADIGAN, DANIEL G SMITH; WViti e'sses:

VVALTER E. LOMBARD, EDWARD F. Abram;

Comini ssi onr 01 25min,

Washington; D. 0: 

